24 SYRIAN MOLLUSCAX FOSSILS. 



of Comparative Zoology, also shows upon casts the remains of longitudinal 

 ribs, and considei'ably resembles these specimens. 



As the Scalaridce are only doubtfully represented in the Jurassic forma- 

 tion, these casts go to confirm the view that the beds from which they 

 were taken are not older than the Cretaceous period. Coll. Merrill. 



Locality and Position. — Beirut district ; from the arenaceous marl, prob- 

 ably Turonian. 



Eunema ? bicarinata, sp. nov. 



Plate II, figs. 5 a, b. 



[Turbo auct. ; Amherleya MoERis & Lycett, 1850, but inadequately deQned, Moll, from Gr. Ool., Pt. I, 

 p. 54; Eunema Saltek, 1859, Canad. Organ. Remains, Dec. I, pp. 24 and 29, PI. vi, fig. 4; Euci/clus 

 Eddes-Deslongchamps, 1860, Mem. Soc. Liuii. de Normandie, V, p. 1.38.] 



Testa turhinaio-conica, tenuiscuta, hand umhiticata : anfradiis quinque vel sex, 

 carinis duabus, snperiori juxta siditram, sccimdu majorc supra medium posita, mimiti ; 

 tittiintts intra carinas atte concavus, infra liris tribus cinctus : apertura superne canali- 

 cidcda, inferne rotunda ; lahimn exsertum a paride distinctwn. 



Shell turbinate-conic, rather thin, without umbilicus: whorls five or six, 

 strengthened by two keels, the upper placed near the suture, the second 

 and larger below the other, but above the middle of each volution ; tlie last 

 whorl deeply concave between the keels and below lliem encircled by three 

 ridges: aperture channelled behind, round in front; inner lip considerably 

 projecting and separate from the body-wall. 



Single specimen, almost entire. Length, 33 mm. ; width, 23 mm. 



The test of the specimen figured is too badly weathered to show, had 

 they once existed, the " strongly sinuate, prominent, and threadlike lines of 

 growth" (Salter, op. cit., p. 24) which mark the typical species. In other 

 respects the shell agrees with the diagnosis of the genus as given by Salter 

 and Morris and Lycett. One character noted ])y the last-named authors is 

 very conspicuous in this example, viz. : " The whorls are received into the 

 concavity of those which succeed, the latter at their jiuictions being slightly 

 overwrapped by the former." (loc. cit.) In this instance the ridge next 

 below the greater keel seems to overlap and nearly hide the suture just 

 beneath. Our shell strongly resembles Salter's typical species, sirigiltata, 

 in its sharp and prominent revolving ridges, posterior canal, and inner lip 

 " not reflected or pressed closely against the coluraellar ba.se." (Salter, 

 op. cit., p. 29.) Fig. 5 a shows within the nperture a deposit which, were 



